Rotation (disambiguation)

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The term rotation can be used in several ways and includes various topics. Generally, it is used to denote (in 3D) the rotation of movement of a rigid body in such a way that any given point of that body remains at a constant distance from some fixed line (in 2D: point).

More specifically, it is applicable to:

The farming practice of crop rotation.
The business management approach of job rotation.
The retail practice of rotating stock (especially fresh produce/bread) to ensure the stock with the soonest sell by date is at the front of the shelf - meaning it will be sold first.

In physics:

The differential rotation of objects.
The optical rotation polarization.

In anatomy:

The motion of a body part about its axis.

In geometry and mathematics:

A transformation in the rotation group
A coordinate rotation is the transformation of coordinate systems.
An improper rotation producing an inversion.

In music:

An order operation that may be performed on a set of pitches or pitch classes, where the last member is placed first. Sets which may be mapped onto each other through rotation are rotationally equivalent. See: transformation, permutation
In music radio, the term refers to how often a song is played. See spin (radio).

Other:

Rotation is also the name of a billiards game.

In baseball pitching, the rotation is the group of starting pitchers for a team, and the order in which they pitch.

The Rotation Speed of an aircraft is the speed required at take-off for the nose to begin lifting off the runway.

In elections, Robson Rotation is the practice of printing multiple ballots for an election, each having the candidates listed in a different order.

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